Light control module and method thereof
First Claim
1. A light control module, appropriate for an optical pointing device, comprising:
- a processing unit outputting a first signal and a second signal;
a photo sensor unit executing a capture operation according to an impulse of the first signal; and
a light emitting unit executing a light emitting operation according to an impulse of the second signal;
wherein when a frequency value of the first signal is less than a first preset value, at least one impulse is inserted between two successive impulses of the second signal for adjusting a frequency value of the second signal such that an equivalent frequency value corresponding to any two successive impulses of the second signal is greater than a second preset value, thus rendering flickers of the light emitting unit imperceptible.
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Accused Products
Abstract
A light control module appropriate for an optical pointing device. The light control module comprises a processing unit outputting a first signal and a second signal, a photo sensor unit executing a capture operation according to an impulse of the first signal, and a light emitting unit executing a light emitting operation according to an impulse of the second signal, wherein when a frequency value of the first signal is less than a first preset value, at least one impulse is inserted between two successive impulses of the second signal for adjusting a frequency value of the second signal such that an equivalent frequency value corresponding to any two successive impulses of the second signal is greater than a second preset value, thus rendering flickers of the light emitting unit imperceptible.
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Citations
10 Claims
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1. A light control module, appropriate for an optical pointing device, comprising:
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a processing unit outputting a first signal and a second signal;
a photo sensor unit executing a capture operation according to an impulse of the first signal; and
a light emitting unit executing a light emitting operation according to an impulse of the second signal;
wherein when a frequency value of the first signal is less than a first preset value, at least one impulse is inserted between two successive impulses of the second signal for adjusting a frequency value of the second signal such that an equivalent frequency value corresponding to any two successive impulses of the second signal is greater than a second preset value, thus rendering flickers of the light emitting unit imperceptible. - View Dependent Claims (2, 3, 4, 5)
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6. A light control method, appropriate for an optical pointing device, comprising the steps of:
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outputting a first signal and a second signal;
executing a capture operation according to an impulse of the first signal;
executing a light emitting operation according to an impulse of the second signal;
determining whether a frequency value of the first signal is less than a first preset value; and
if so, inserting at least one impulse between two successive impulses of the second signal for adjusting a frequency value of the second signal such that an equivalent frequency value corresponding to any two successive impulses of the second signal is greater than a second preset value, thus rendering flickers of light imperceptible. - View Dependent Claims (7, 8, 9, 10)
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Specification